Wedding Ring is a mythic Artifact card from Crimson Vow Commander (VOC), collector number 32. Current market price: $12.28, TCGplayer market prices via Scryfall.
When this artifact enters, if it was cast, target opponent creates a token that's a copy of it. Whenever an opponent who controls an artifact named Wedding Ring draws a card during their turn, you draw a card. Whenever an opponent who controls an artifact named Wedding Ring gains life during their turn, you gain that much life.